PP 2010, held at Dartmouth College in Hanover, New Hampshire Plenary speakers: Nik Ruškuc and Richard Stanley. Supported by NSF grant DMS-1003908. Also supported by NSA.Website: http://www.math.dartmouth.edu/~pp2010/

PP2013, held at the University of Paris, Diderot. Plenary speakers: Sergi Elizalde and Stéphane Vialette. Supported by NSF grant DMS-1265936 and NSA grant Co-13-PP2013-0413-valpo-1-121011-PudwellWebsite: http://www.lix.polytechnique.fr/pp2013/